Last updated August 27, 2026

Sources and evidence standards

Different claims need different sources. A price needs the provider's page; a safety statement needs the label or a trial.

Hierarchy

1. FDA labels, approvals, shortage and compounding statements; state pharmacy-board records.
2. Peer-reviewed randomised trials and their registrations; systematic reviews.
3. Professional-society guidelines.
4. Manufacturer prescribing information and direct-to-patient pricing pages.
5. Provider pricing pages, checkouts and terms (for that provider's own prices and policies only).
6. Reputable secondary reporting, used only to prompt verification against a primary source.

Not cited for facts

Other comparison sites, affiliate reviews, forum posts, social media, search-engine or AI answers, and any provider's claims about a competitor.

Clinical claims

Every efficacy or safety statement is tied to a labelled indication or a named trial and carries an evidence grade. Compounded and non-standard formulations (microdose, orally disintegrating, sublingual, formulations with additives) are described as lacking trial evidence for that form unless a trial exists, which we would name. See the medical review policy.